The main work of this thesis is simulation of the thermal characteristic and cold - test characteristic for coupled - cavity twt slow - wave structure with ansys , which is a finite - element software . then the redevelopment upon this software was performed 本文的主要工作就是利用大型通用有限元计算软件ansys模拟耦合腔行波管慢波结构的热特性和冷测特性并对该软件进行了二次开发。
The honeycomb board impregnated absorbant can reach less reflection within wider frequency band and better mechanical performance and very little density . all these characteristics make it as an material to fabricate some parts of the aircraft 浸渍吸收剂的蜂窝板可以在宽频带范围内达到较小的反射、有很好的力学性能和很小的比重，这些特点成为制造飞行器吸波结构的最重要的材料。
In the dissertation , the rf characteristics of the periodically iris - loaded elliptical waveguide used in slow - wave structure is discussed . the structure has potential applications to high - power microwave devices and filtering networks at millimeter wave frequencies 在本论文里,我们讨论了周期膜片加载椭圆波导作为慢波结构的射频特性,这种结构有可能应用于高功率器件和毫米波段的滤波网络。
It is paid attention to that the longitudinal component of electric field of the coaxial tm01 mode can be strong , differing from the tem mode in the conventional coaxial waveguide . so the coaxial tm01 mode can have much strong interaction with the electron beam 值得注意的是,与普通同轴结构tem波不同,同轴慢波结构tm01模式的纵向电场不为零,这是同轴返波振荡器中的电子束能够与它有强相互作用的重要原因。
In the non - coaxial bwo of l - band , the radius of the slow - wave structure is very large , and the volume and weight of the guiding - magnetic system are also very large . thus , the non - coaxial bwo of l - band is bulky and lumbersome and is inconvenient for real application 若采用非同轴相对论返波振荡器实现l波段的微波输出,则要求慢波结构的平均半径很大,导引磁场系统的体积和重量会变得较大,这给器件的小型化带来了很大的困难。
As a low noise , broadband , high power and high gain microwave vacuum tubes , traveling wave tubes ( twts ) have been widely used in military radars , satellite communications and electronic confrontations , which play an important role in modern electronic equipments 行波管是一种低噪声、宽频带、高功率、高增益的微波器件,被广泛应用于军事雷达,卫星通信,电子对抗等领域,发挥着极其重要的作用。慢波结构是行波管的核心,决定着行波管的技术性能。
At the time of design , the measurement of dispersion and interaction impedance will be used as design verification and improvement . at the time of manufacture , the measurement will find the problems of the slow - wave structures in machining , weld and fitting 在管子研制阶段,对色散和耦合阻抗冷参量的测量可以起到验证、改进设计的作用;在管子生产阶段,通过测量可以及早发现慢波结构在加工、焊接、装配过程中的问题,防止瑕疵品继续流水作业,提高生产效率。
4 . finally , the investigation of wave propagation characteristic in round waveguide filled uniformity plasma periodically magnetized is done , by numerical calculation , to analyze the effect on the propagation characteristic when additional magnetic field amplitude , background magnetic field and plasma density change 4 .研究了电磁波在填充周期磁化均匀等离子体金属圆波导中的传输特性,推导出该周期慢波结构的色散方程,通过数值计算,绘出了色散曲线图
In this paper , a novel folded groove waveguide slow - wave structure is proposed with the foundation of folded waveguide and grooved guide . high frequency characteristics of such sws are also analyzed in this paper . the main works are listed as follows : 1 本论文以曲折波导慢波系统和槽波导传输线为基础,综合二者的优点和目前曲折波导在thz辐射振荡器中遇到的问题,提出一种新型的曲折槽波导慢波系统的概念,并对这种新型慢波结构的高频特性进行了详细的研究。
In the domestic factories of twt manufacture , the data of dispersion and interaction impedance are usually obtained by simulation . although the measurement of beam - wave interaction can get the data , which including large and expensive equipments . but it can not find the blemish of sws as early because it must wait until the finishing of whole manufacture 目前,国内行波管生产科研单位基本都是通过软件计算得到慢波结构的色散和耦合阻抗冷参量,或者待整支管子装配完成后,通过热测来估计出慢波结构的色散和耦合阻抗,这样做不但测量不准确,而且也不能及时发现慢波结构的缺陷,浪费了大量人力、财力。
